This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A293562 #6 Oct 12 2017 08:09:59
%S A293562 4,65,566,3710,20756,105299,500862,2278936,10046620,43280341,
%T A293562 183278902,766153042,3171277460,13027450455,53203165950,216290270892,
%U A293562 876183166140,3539559610905,14267986165270,57416955957350,230750092893524,926388737476955,3716144413352126
%N A293562 Column 4 of A142249.
%H A293562 Vaclav Kotesovec, <a href="/A293562/b293562.txt">Table of n, a(n) for n = 4..300</a>
%F A293562 a(n) ~ 5 * 4^n / 6.
%t A293562 Table[(CoefficientList[Simplify[(1-x)^n * PolyLog[-n, 2, x] / (x*Log[1-x])], x]/.x->1-E)[[4]], {n, 5, 20}]
%Y A293562 Cf. A142249.
%K A293562 nonn
%O A293562 4,1
%A A293562 _Vaclav Kotesovec_, Oct 12 2017